Correct spelling for the English word "wert influential" is [wˈɜːt ˌɪnfluːˈɛnʃə͡l], [wˈɜːt ˌɪnfluːˈɛnʃəl], [w_ˈɜː_t ˌɪ_n_f_l_uː_ˈɛ_n_ʃ_əl] (IPA phonetic alphabet).
The phrase "wert influential" does not have a specific etymology as it seems to be a combination of two words: "wert" and "influential".
"Wert" is the archaic second-person singular past tense of the verb "to be" in Old English. It is used with "thou" as a subject. In modern English, "wert" is no longer in common use, as it has been replaced by "were".
"Influential" comes from the Latin word "influentialis", which means "flowing in". The term was first used in its current sense in the mid-17th century, referring to someone or something having the power or ability to influence others.
So, the combination of "wert" and "influential" would imply someone or something that had a significant impact or power to shape or sway others in the archaic form of English.